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Euphytica

, 214:151 | Cite as

Root architectural traits and yield: exploring the relationship in barley breeding trials

  • Hannah Robinson
  • Alison Kelly
  • Glen Fox
  • Jerome Franckowiak
  • Andrew Borrell
  • Lee Hickey
Article

Abstract

Root system architecture is fundamental to resource capture and productivity of cereal crops. Understanding the genetics modulating root development will empower plant breeders to design cultivars with optimal root systems for the target environment. Here, we investigate the genetic association between seminal root traits and yield in elite barley (Hordeum vulgare L.) germplasm. A panel of 216 breeding lines from the Northern Region Barley Breeding program in Australia, genotyped with Diversity Arrays Technology markers, were characterised for seminal root angle and number. A high degree of phenotypic variation was evident in the population, ranging from 12.0° to 89.4° and 4.8 to 6.1 for root angle and number, respectively. A quantitative trait locus for root angle (qRA-5) was detected on chromosome 5H and co-located with the previously described RAQ2. The genetic relationship between seminal root traits and yield for the panel was investigated using root phenotypes and yield data from 20 field trials. Genetic correlations with yield ranged from − 0.21 to 0.36 for root angle and from − 0.20 to 0.25 for root number. The direction and magnitude of the correlations for both root traits varied across the environments, but overall root angle was deemed more strongly associated with yield. Here we provide insight into the root phenotypes of breeding lines and deliver a first look at the genetic relationship between root architectural traits and yield in barley breeding trials.

Keywords

Barley Roots Root angle Root number Yield Quantitative trait loci 

Notes

Acknowledgements

This work was supported by the University of Queensland, Queensland Alliance for Agriculture and Food Innovation and Grains Research and Development Corporation of Australia, through a PhD scholarship (GRS10940) for Hannah Robinson.

Supplementary material

10681_2018_2219_MOESM1_ESM.docx (2.9 mb)
Supplementary material 1 (DOCX 2961 kb)

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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  • Hannah Robinson
    • 1
  • Alison Kelly
    • 2
    • 3
  • Glen Fox
    • 3
    • 4
  • Jerome Franckowiak
    • 5
  • Andrew Borrell
    • 6
  • Lee Hickey
    • 1
  1. 1.Queensland Alliance for Agriculture and Food Innovation, The University of QueenslandSt LuciaAustralia
  2. 2.Department of Agriculture and FisheriesLeslie Research FacilityToowoombaAustralia
  3. 3.Queensland Alliance for Agriculture and Food Innovation, The University of QueenslandToowoombaAustralia
  4. 4.Department of Food ScienceStellenbosch UniversityStellenboschSouth Africa
  5. 5.Department of Agronomy and Plant GeneticsUniversity of MinnesotaSt PaulUSA
  6. 6.Queensland Alliance for Agriculture and Food Innovation, Hermitage Research Facility, The University of QueenslandWarwickAustralia

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